Subscribe to our free daily newsletters
. 24/7 Space News .

Subscribe to our free daily newsletters

Spirit Looks Down Into Crater After Reaching Rim

On the 66th martian day, or sol, of its mission, the Mars Exploration Rover Spirit finished a drive and sent back this navigation camera image mosaic revealing "Bonneville" crater in its entirety.
Mars Desks
  • 1024x768   - 800x600
  • 1800x1200 - 1280x1024
  • Pasadena (JPL) Mar 11, 2004
    NASA's Spirit has begun looking down into a crater it has been approaching for several weeks, providing a view of what's below the surrounding surface.

    Spirit has also been looking up, seeing stars and the first observation of Earth from the surface of another planet. Its twin, Opportunity, has shown scientists a "mother lode" of hematite now considered a target for close-up investigation.

    "It's been an extremely exciting and productive week for both of the rovers," said Spirit Mission Manager Jennifer Trosper at NASA's Jet Propulsion Laboratory, Pasadena, Calif.

    Dr. Chris Leger, a rover driver at JPL, said, "The terrain has been getting trickier and trickier as we've gotten close to the crater. The slopes have been getting steeper and we have more rocks." Spirit has now traveled a total of 335 meters (1,099 feet).

    Spirit's new position on the rim of the crater nicknamed "Bonneville" offers a vista in all directions, including the crater interior. The distance to the opposite rim is about the length of two football fields, nearly 10 times the diameter of Opportunity's landing-site crater halfway around the planet from Spirit.

    Initial images from Spirit's navigation camera do not reveal any obvious layers in "Bonneville's" inner wall, but they do show tantalizing clues of rock features high on the far side, science-team member Dr. Matt Golombek of JPL said at a news briefing today.

    "This place where we've just arrived has opened up, and it's going to take us a few days to get our arms around it."

    Scientists anticipate soon learning more about the crater from Spirit's higher-resolution panoramic camera and the miniature thermal emission spectrometer, both of which can identify minerals from a distance. They will use that information for deciding whether to send Spirit down into the crater.

    From the crater rim and during martian nighttime earlier today, Spirit took pictures of stars, including a portion of the constellation Orion. Shortly before dawn four martian days earlier, it photographed Earth as a speck of light in the morning twilight.

    The tests of rover capabilities for astronomical observations will be used in planning possible studies of Mars' atmospheric characteristics at night.

    Those studies might include estimating the amounts of dust and ice particles in the atmosphere from their effects on starlight, said Dr. Mark Lemmon, a science team member from Texas A&M University, College Station.

    Opportunity has been looking up, too. It has photographed Mars' larger moon, Phobos, passing in front of the Sun twice in the past week, and Mars' smaller moon, Deimos, doing so once.

    Opportunity's miniature thermal emission spectrometer has taken upward-looking readings of the atmospheric temperature at the same time as a similar instrument, the thermal emission spectrometer on NASA's Mars Global Surveyor orbiter, took downward-pointed readings while passing overhead.

    "They were actually looking directly along the same path," said science team member Dr. Michael Wolff of the Martinez, Ga., branch of the Space Science Institute, Boulder, Colo. The combined readings give the first full temperature profile from the top of Mars' atmosphere to the surface."

    When pointed at the ground, Opportunity's miniature thermal emission spectrometer has checked the abundance of hematite in all directions from the rover's location inside its landing-site crater. This mineral, in its coarse-grained form, usually forms in a wet environment.

    Detection of hematite from orbit was the prime factor in selection of the Meridiani Planum region for Opportunity's landing site.

    "The plains outside our crater are covered with hematite," said Dr. Phil Christensen of Arizona State University, Tempe, lead scientist for the instrument.

    "The rock outcrop we've been studying has some hematite. Parts of the floor of the crater, interestingly enough, have virtually none."

    The pattern fits a theory that the crater was dug by an impact that punched through a hematite-rich surface layer, he said.

    One goal for Opportunity's future work is to learn more about that surface layer to get more clues about the wet past environment indicated by sulfate minerals identified last week in the crater's outcrop.

    Christensen said that before Opportunity drives out of the crater in about 10 days, scientists plan to investigate one area on the inner slope of the crater that he called "the mother lode of hematite."

    Related Links
    Mars Rovers at JPL
    Mars Rovers at Cornell
    Search SpaceDaily
    Subscribe To SpaceDaily Express

    Slip Sliding Away On The Red Planet
    Pasadena (JPL) Mar 10, 2004
    On February 9, the wake up song for Opportunity was 'Slip Sliding Away' by Simon and Garfunkel in honor of the experience the prior day when Opportunity first tried to scoot up the crater slope at Meridiani Planum. The ambitious rover aimed for its target and willingly went forth up the slope; nevertheless, Opportunity slipped and slid in the sand, making it only half way to its target.

    Thanks for being here;
    We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

    With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

    Our news coverage takes time and effort to publish 365 days a year.

    If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.

    SpaceDaily Contributor
    $5 Billed Once

    credit card or paypal
    SpaceDaily Monthly Supporter
    $5 Billed Monthly

    paypal only

    Memory Foam Mattress Review
    Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
    XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News

    The content herein, unless otherwise known to be public domain, are Copyright 1995-2016 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement All images and articles appearing on Space Media Network have been edited or digitally altered in some way. Any requests to remove copyright material will be acted upon in a timely and appropriate manner. Any attempt to extort money from Space Media Network will be ignored and reported to Australian Law Enforcement Agencies as a potential case of financial fraud involving the use of a telephonic carriage device or postal service.